{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "The structures were elucidated based on ( 13 ) C - and ( 1 ) H - NMR as well as 2D - NMR , IR and different MS spectra and the immunomodulation activity for compound 1 was evaluated through lymphocyte proliferation assay , IL - 2 assay , oxidative burst of phagocytic leukocytes and through their cytotoxicity on two cell lines ."}
{"Chemical": ["( 13 ) C", "( 1 ) H"]}